gcc/gcc/target-globals.c

/* Target-dependent globals.
   Copyright (C) 2010-2017 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "rtl.h"
#include "tree.h"
#include "expmed.h"
#include "optabs-query.h"
#include "insn-config.h"
#include "regs.h"
#include "memmodel.h"
#include "ira.h"
#include "ira-int.h"
#include "toplev.h"
#include "target-globals.h"
#include "flags.h"
#include "reload.h"
#include "libfuncs.h"
#include "cfgloop.h"
#include "builtins.h"
#include "gcse.h"
#include "bb-reorder.h"
#include "lower-subreg.h"

#if SWITCHABLE_TARGET
struct target_globals default_target_globals = {
  &default_target_flag_state,
  &default_target_regs,
  &default_target_rtl,
  &default_target_recog,
  &default_target_hard_regs,
  &default_target_reload,
  &default_target_expmed,
  &default_target_optabs,
  &default_target_libfuncs,
  &default_target_cfgloop,
  &default_target_ira,
  &default_target_ira_int,
  &default_target_builtins,
  &default_target_gcse,
  &default_target_bb_reorder,
  &default_target_lower_subreg
};

struct target_globals *
save_target_globals (void)
{
  struct target_globals *g = ggc_cleared_alloc <target_globals> ();
  g->flag_state = XCNEW (struct target_flag_state);
  g->regs = XCNEW (struct target_regs);
  g->rtl = ggc_cleared_alloc<target_rtl> ();
  g->recog = XCNEW (struct target_recog);
  g->hard_regs = XCNEW (struct target_hard_regs);
  g->reload = XCNEW (struct target_reload);
  g->expmed = XCNEW (struct target_expmed);
  g->optabs = XCNEW (struct target_optabs);
  g->libfuncs = ggc_cleared_alloc<target_libfuncs> ();
  g->cfgloop = XCNEW (struct target_cfgloop);
  g->ira = XCNEW (struct target_ira);
  g->ira_int = XCNEW (struct target_ira_int);
  g->builtins = XCNEW (struct target_builtins);
  g->gcse = XCNEW (struct target_gcse);
  g->bb_reorder = XCNEW (struct target_bb_reorder);
  g->lower_subreg = XCNEW (struct target_lower_subreg);
  restore_target_globals (g);
  init_reg_sets ();
  target_reinit ();
  return g;
}

/* Like save_target_globals() above, but set *this_target_optabs
   correctly when a previous function has changed
   *this_target_optabs.  */

struct target_globals *
save_target_globals_default_opts ()
{
  struct target_globals *globals;

  if (optimization_current_node != optimization_default_node)
    {
      tree opts = optimization_current_node;
      /* Temporarily switch to the default optimization node, so that
	 *this_target_optabs is set to the default, not reflecting
	 whatever a previous function used for the optimize
	 attribute.  */
      optimization_current_node = optimization_default_node;
      cl_optimization_restore
	(&global_options,
	 TREE_OPTIMIZATION (optimization_default_node));
      globals = save_target_globals ();
      optimization_current_node = opts;
      cl_optimization_restore (&global_options,
			       TREE_OPTIMIZATION (opts));
      return globals;
    }
  return save_target_globals ();
}

target_globals::~target_globals ()
{
  /* default_target_globals points to static data so shouldn't be freed.  */
  if (this != &default_target_globals)
    {
      ira_int->~target_ira_int ();
      hard_regs->finalize ();
      XDELETE (flag_state);
      XDELETE (regs);
      XDELETE (recog);
      XDELETE (hard_regs);
      XDELETE (reload);
      XDELETE (expmed);
      XDELETE (optabs);
      XDELETE (cfgloop);
      XDELETE (ira);
      XDELETE (ira_int);
      XDELETE (builtins);
      XDELETE (gcse);
      XDELETE (bb_reorder);
      XDELETE (lower_subreg);
    }
}

#endif